HEAT oven to 375°F. Cook pasta as directed on package, adding spinach to the boiling water during the last 1 min of cooking.,______,DRAIN pasta and spinach; return to same saucepan. Add chicken mixture; mix lightly. Stir in 1/2 cup mozzarella cheese. Spoon into 2-L or 8-inch square baking dish.,BAKE 20 minute or until heated through. Sprinkle with remaining mozzarella cheese and the Parmesan cheese. Bake 3 minute or until cheese is melted.